package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.controller.admin.EmployeeController;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.LoginFailedException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;


    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);

        employee.setStatus(StatusConstant.ENABLE);
       /* employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());*/

        //默认密码123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
       /* employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        employeeMapper.save(employee);
    }

    /**员工分页查询
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {

        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //这里是遵循PageHelper的返回格式，必须如此
        Page<Employee> page = employeeMapper.page(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> records = page.getResult();
        return new PageResult(total,records);
    }

    /**启用禁用员工账号
     *  但此单元并不局限于启用禁用，是一个动态的代码，后续可以根据出入的参数的不同
     *  做不同的修改
     * @param status
     * @param id
     */
    @Override
    public void startOrstop(Integer status, Long id) {
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        //构建器，与上述代码功能相同
       /* Employee build = Employee.builder()
                .status(status)
                .id(id)
                .build();*/

        employeeMapper.update(employee);
    }

    @Override
    public Employee findByid(Integer id) {
        Employee employee = employeeMapper.findByid(id);
        //回显的数据中包括密码，这里设置为符号保障安全
        employee.setPassword("****");
        return employee;
    }

    @Override
    public void updateMessage(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        /*employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        employeeMapper.update(employee);

    }

    /**修改密码
     *
     * @param passwordEditDTO
     */
    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        Long empId = BaseContext.getCurrentId();
        Employee employee = employeeMapper.findByid(Math.toIntExact(empId));
        String oldpassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        String newPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes());

        if (oldpassword.equals(employee.getPassword())){
            Employee emp = Employee.builder().id(empId)
                    .password(newPassword).build();

            employeeMapper.update(emp);


        }
        else {
            throw new LoginFailedException(MessageConstant.PASSWORD_EDIT_FAILED);
        }

    }


}
